Holt Integrated Circuits
23
Table 1 – Memory mapped I/O Device control signals
Device Signal
Source
Function
Address
Software
read/write
Use
BC_TRIG
FPGA->Device
BC trigger pulse
0x8000
Read/Write
Set High then low (1/0)
NMR
FPGA
Resets Device
0x8002
Read/Write
Set Low then High
TEST
FPGA
Test pin state
0x8003
Read/Write
Set High for Test mode.
See 6130 data sheet
for test mode.
BCENA
FPGA
Enables BC
0x8004
Read/Write
Set high to enable BC
MTRUN
FPGA -> Device Enables MT
0x8009
Read/Write
Set high to enable MT
RT1ENA
FPGA -> Device Enables RT1
0x800A
Read/Write
Set High to Enable RT1
RT2ENA
FPGA -> Device Enables RT2
0x800B
Read/Write
Set High to Enable RT2
TXINHA/TXINHB
J4 Connector
Inhibits bus
0x800C
Read only
Hard-wired to J4
INPUT_CONTROL
FPGA
Set Demo mode
or User mode
0x800E
Read/Write
0=Demo mode
(default)
1=User mode
SPARE_INPUT
J4 Connector
Spare input
0x800E
Read only
Readable Spare input.
MTPKTRDY
Device -> FPGA Monitor Packet
ready device
output
0x800F
Read only
Optional read
ACTIVE
Device -> FPGA Active state
0x8010
Read only
Optional read
RT1MC8
Device->FPGA
RT1 Mode Code 8 0x8011
Read only
Optional read
RT2MC8
Device->FPGA
RT2 Mode Code 8 0x8012
Read only
Optional read
READY
Device->FPGA
Indicates Ready
state
0x8013
Read only
Optional read. Used by
demo software to
determine when
devices are ready after
MR.